The Long Plain First Nation is an Ojibway First Nations band government whose reserve is located in the Central Plains region of Manitoba, Canada. It is located to the southwest of Portage la Prairie along the Assiniboine River. It lies between the Rural Municipality of Portage la Prairie and the Rural Municipality of South Norfolk, and also borders another band's Indian reserve, that of the Dakota Plains First Nation. The 2006 census reported a population of 752 residents.